TL494BDR2G

Product Overview

Category: Integrated Circuit (IC)

Use: TL494BDR2G is a pulse-width modulation (PWM) control circuit. It is commonly used in power supply applications to regulate the output voltage.

Characteristics: - Provides precise control of pulse width modulation - Offers adjustable frequency and duty cycle - Supports both push-pull and single-ended configurations - Suitable for high-frequency operation - Can drive various types of power transistors

Package: TL494BDR2G comes in an SOIC-16 package, which stands for Small Outline Integrated Circuit. This package provides a compact and reliable solution for mounting the IC on a printed circuit board.

Essence: The essence of TL494BDR2G lies in its ability to generate precise PWM signals, making it an essential component in power supply designs.

Packaging/Quantity: TL494BDR2G is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 7V to 40V
• Output Current: Up to 200mA
• Operating Temperature Range: -40°C to +85°C
• Frequency Range: 100Hz to 500kHz
• Duty Cycle Range: 0% to 100%

Detailed Pin Configuration

The TL494BDR2G IC has 16 pins arranged as follows:

1. Error Amplifier Input
2. Error Amplifier Output
3. Feedback Input
4. Oscillator Timing Capacitor
5. Oscillator Timing Resistor
6. Dead Time Control
7. Dead Time Control
8. Output Control
9. Output Control
10. VCC (Supply Voltage)
11. Ground
12. Output
13. Output
14. Compensation
15. Soft Start
16. Shutdown

Functional Features

• Error Amplifier: Provides feedback control to maintain the desired output voltage.
• Oscillator: Generates a stable frequency for the PWM signal.
• Dead Time Control: Adjusts the time delay between complementary PWM signals to prevent shoot-through current in push-pull configurations.
• Output Control: Determines the duty cycle of the PWM signal.
• Soft Start: Gradually ramps up the output voltage during startup to prevent excessive inrush current.
• Shutdown: Allows the IC to be turned off when not in use, reducing power consumption.

Advantages and Disadvantages

Advantages: - Precise control of PWM signals - Adjustable frequency and duty cycle - Versatile compatibility with different power transistors - Suitable for high-frequency operation

Disadvantages: - Limited output current capacity (up to 200mA) - Requires external components for complete power supply design

Working Principles

TL494BDR2G operates by comparing the feedback voltage from the output with a reference voltage. The error amplifier adjusts the duty cycle of the PWM signal based on this comparison. The oscillator generates a stable frequency, which is then modulated by the duty cycle control. The resulting PWM signal is used to drive the power transistors, regulating the output voltage.

Detailed Application Field Plans

TL494BDR2G finds applications in various fields, including: 1. Switching Power Supplies 2. Battery Chargers 3. DC-DC Converters 4. Inverters 5. Motor Speed Controllers

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to TL494BDR2G are: 1. SG3525 2. UC3843 3. IRS2153D 4. MC34063A 5. LT1241

These models offer similar functionality and can be used as replacements depending on specific requirements.

In conclusion, TL494BDR2G is a versatile PWM control circuit widely used in power supply applications. Its precise control, adjustable parameters, and compatibility with various power transistors make it a popular choice among designers. However, its limited output current capacity and the need for additional components should be considered when selecting this IC for a specific application.